/*
 * This file Copyright (c) 2015. Walle.
 * (http://www.wallellen.com). All rights reserved.
 *
 *
 * This file is dual-licensed under both the
 * Walle Agreement (WA) and the GNU General Public License.
 * You may elect to use one or the other of these licenses.
 *
 * This file is distributed in the hope that it will be
 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
 * Redistribution, except as permitted by whichever of the GPL
 * or WA you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or
 * modify this file under the terms of the GNU General
 * Public License, Version 3, as published by the Free Software
 * Foundation.  You should have received a copy of the GNU
 * General Public License, Version 3 along with this program;
 * if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 2. For the Walle Agreement (WA), this file
 * and the accompanying materials are made available under the
 * terms of the WA which accompanies this distribution, and
 * is available at http://www.wallellen.com/agreement.html
 *
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 */

package com.wallellen.core;

import com.wallellen.core.auth.util.MD5;

import java.net.NetworkInterface;
import java.util.Enumeration;

/**
 * Created by walle on 12/9/15.
 */
public class SequenceService {
    protected static String getMD5(String message) {
        String md5 = new MD5().getMD5ofStr(message);
        return getSplitString(md5);
    }

    public static String InitKey() {
        return getMD5(getSigarSequence());
    }

    protected static String getSplitString(String str) {
        return getSplitString(str.substring(0, 16), "-", 4);
    }

    protected static String getSplitString(String str, String split, int length) {
        int len = str.length();
        StringBuilder temp = new StringBuilder();
        for (int i = 0; i < len; i++) {
            if ((i % length == 0) && (i > 0)) {
                temp.append(split);
            }
            temp.append(str.charAt(i));
        }
        String[] attrs = temp.toString().split(split);
        StringBuilder finalMachineCode = new StringBuilder();
        for (String attr : attrs) {
            if (attr.length() == length) {
                finalMachineCode.append(attr).append(split);
            }
        }
        String result = finalMachineCode.toString().substring(0, finalMachineCode.toString().length() - 1);
        return result;
    }

    protected static String getSigarSequence() {
        return "asdf";
    }

    public static String getMacAddress()
            throws Exception {
        Enumeration ni = NetworkInterface.getNetworkInterfaces();

        while (ni.hasMoreElements()) {
            NetworkInterface netI = (NetworkInterface) ni.nextElement();

            byte[] bytes = netI.getHardwareAddress();
            if ((netI.isUp()) && (netI != null) && (bytes != null) && (bytes.length == 6)) {
                StringBuffer sb = new StringBuffer();
                for (byte b : bytes) {
                    sb.append(Integer.toHexString((b & 0xF0) >> 4));

                    sb.append(Integer.toHexString(b & 0xF));
                    sb.append("-");
                }
                sb.deleteCharAt(sb.length() - 1);
                return sb.toString().toUpperCase();
            }
        }
        return null;
    }

    public static void main(String[] args) {
        System.out.println(InitKey());
    }
}
